OFDM信号伪逆谱分析及参数估计  

Pseudo-Inverse Spectrum Analysis and Parameter Estimation of OFDM Signals

作　　者：张海川[1,2] 雷迎科[1,2] 

机构地区：[1]电子工程学院,合肥230037 [2]通信信息控制和安全技术重点实验室,浙江嘉兴314033

出　　处：《电子信息对抗技术》2016年第5期10-14,51,共6页Electronic Information Warfare Technology

基　　金：国家自然科学基金资助项目(61272333);国防科技重点实验室基金(9140C130502140C13068);解放军总装备部预研项目基金(9140A33030114JB39470);安徽省自然科学基金资助项目(1308085QF99)

摘　　要：提出一种基于伪逆谱的OFDM信号盲检测方法,方法充分利用了OFDM信号伪逆谱谱线的隐含周期性,具有较强的抑制加性干扰和乘性干扰的能力,能够在较低的信噪比条件下快速准确地检测OFDM信号,可以精确估计出OFDM信号的子载波频率间隔、符号周期、信号带宽、子载波数目,具有运算量小、精度高、适于硬件实现等特点。仿真结果进一步说明了该检测方法的有效性。A method for blind detection of OFDM signal based on pseudo-inverse spectrum is presented, which makes use of hidden periodicity of OFDM＇ s pseudo-inverse spectrum and has a strong ability to bate the add interference and multiply interference so as to identify OFDM sig- nals at lower signal/noise ratio. It not only can accurately estimate the sub-carrier frequency in- terval, symbol periods, bandwidth and sub-carrier numbers of OFDM signals, but also has low- er computational complexity and more accurate estimation, which are proper for hardware imple- ment. The simulations further demonstrate the effectivity of our scheme.

关 键 词：盲检测 正交频分复用 伪逆谱 子载波频率间隔估计 

分 类 号：TN971.1[电子电信—信号与信息处理]